Investigation on Thermal Degradation Process of Polymer Solar Cells Based on Blend of PBDTTT-C and BM

Table 1

Device parameters of the conventional and inverted devices which are kept at 70°C for different time.

Device structures	Time (h)	Jsc (mA/cm^2)	Voc (V)	FF (%)	PCE (%)
Conventional	Control	15.41	0.71	60.56	6.62
	1	14.91	0.71	58.34	6.17
	2	14.79	0.70	58.99	6.11
	3	14.77	0.71	57.94	6.07
	5	14.37	0.71	58.97	6.01
	18	13.71	0.72	58.38	5.76
Inverted	Control	15.28	0.72	61.33	6.74
	1	15.12	0.72	61.40	6.68
	2	14.66	0.71	62.64	6.52
	3	14.64	0.71	62.37	6.48
	5	14.59	0.71	62.46	6.47
	18	13.86	0.71	62.08	6.11